<template>
  <view class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper
      :indicator-dots="true"
      :autoplay="true"
      :interval="3000"
      :duration="1000"
      :circular="true"
      indicator-active-color="#C00000"
    >
      <swiper-item v-for="(item, index) in goods_info.pics" :key="index">
        <!-- 把当前图片的索引值传递到 preview() 处理函数中 -->
        <image
          :src="item.pics_big"
          mode="widthFix"
          class=""
          @click="preview(index)"
        ></image>
      </swiper-item>
    </swiper>

    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price" v-if="goods_info.goods_price">
        ￥{{ goods_info.goods_price }}
      </view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名字 -->
        <view class="goods-info-name" v-if="goods_info.goods_name">
          {{ goods_info.goods_name }}
        </view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yunfei">快递:免运费</view>
    </view>

    <!-- 渲染商品详情信息 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>

    <!-- 商品导航组件 -->
    <view class="goods_nav">
      <!-- fill 控制右侧按钮的样式 -->
      <!-- options 左侧按钮的配置项 -->
      <!-- buttonGroup 右侧按钮的配置项 -->
      <!-- click 左侧按钮的点击事件处理函数 -->
      <!-- buttonClick 右侧按钮的点击事件处理函数 -->
      <uni-goods-nav
        :fill="true"
        :options="options"
        :buttonGroup="buttonGroup"
        @click="onClick"
        @buttonClick="buttonClick"
      />
    </view>
  </view>
</template>

<script>
import { mapState, mapMutations, mapGetters } from 'vuex';
export default {
  data() {
    return {
      // 商品详情对象
      goods_info: {},
      // 商品导航组件数据
      options: [
        {
          icon: 'shop',
          text: '店铺',
          infoBackgroundColor: '#007aff',
          infoColor: 'red'
        },
        {
          icon: 'cart',
          text: '购物车',
          info: 0
        }
      ],
      buttonGroup: [
        {
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        },
        {
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }
      ]
    };
  },
  onLoad(options) {
    // 获取商品id
    let goods_id = options.goods_id;
    // 调用请求商品详情数据的方法
    this.getGoodsDetail(goods_id);
    // this.options[1].info = this.total;
  },
  methods: {
    // 把 m_cart 模块中的 addToCart 方法映射到当前页面使用
    ...mapMutations('moduleCart', ['addToCart']),

    async getGoodsDetail(goods_id) {
      let result = await uni.$http.get('/api/public/v1/goods/detail', {
        goods_id
      });
      if (result.data.meta.status == 200) {
        result.data.message.goods_introduce = result.data.message.goods_introduce.replace(
          /<img /g,
          '<img style="display:block;"'
        );
        this.goods_info = result.data.message;
      } else {
        uni.$showMsg();
      }
    },
    // 实现轮播图的预览效果
    preview(index) {
      uni.previewImage({
        current: index,
        urls: this.goods_info.pics.map(item => item.pics_big)
      });
    },
    // 左侧点击事件 e = {index,content}
    onClick(e) {
      uni.switchTab({
        url: '/pages/cart/cart'
      });
    },
    // 右侧按钮组点击事件	e = {index,content}
    buttonClick(e) {
      // 1. 判断是否点击了 加入购物车按钮
      if (e.content.text == '加入购物车') {
        // 2. 组织一个商品的信息对象
        let { goods_info } = this;
        const goods = {
          goods_id: goods_info.goods_id, // 商品的Id
          goods_name: goods_info.goods_name, // 商品的名称
          goods_price: goods_info.goods_price, // 商品的价格
          goods_count: 1, // 商品的数量
          goods_small_logo: goods_info.goods_small_logo, // 商品的图片
          goods_state: true // 商品的勾选状态
        };
        // 3. 通过 this 调用映射过来的 addToCart 方法，把商品信息对象存储到购物车中
        this.addToCart(goods);
      }
    }
  },
  computed: {
    // ...mapState('m_cart',['cart'])
    // ...mapState({ cart: state => state.moduleCart.cart }) // 胡子里面正常写length
    ...mapGetters('moduleCart', ['total'])
  },
  watch: {
    total: {
      immediate: true,
      handler(newValue) {
        const findResult = this.options.find(item => item.text == '购物车');
        if (findResult) {
          findResult.info = newValue;
        }
      }
    }
  }
};
</script>

<style lang="scss">
swiper {
  height: 750rpx;

  image {
    width: 100%;
    height: 100%;
  }
}

.goods-info-box {
  padding: 10px;
  padding-right: 0;
  .price {
    color: #c00000;
    font-size: 18px;
    margin: 10px 0;
  }
  .goods-info-body {
    display: flex;
    justify-content: space-between;
    .goods-info-name {
      font-size: 13px;
      margin-right: 10px;
    }
    .favi {
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left: 1px solid #d8d8d8;
      color: gray;
    }
  }
  .yunfei {
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}

.goods_nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}

.goods-detail-container {
  padding-bottom: 50px;
}
</style>
